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- W1567498556 abstract "The odd-order real zeros of a real-valued signal, s(t), correspond to its conventional or overt zero-crossings. They can be easily determined. But the complex zeros of s(t) are not easy to determine. This suggests the possibility of converting s(t) by using some invertible transformation, into a different signal, whose real zero-crossings determine s(t) completely. This process is known as real-zero conversion. The real zero-crossings of the converted signal are termed covert zero-crossings (cozecs), since they only indirectly determine s(t). In this paper we present a new adaptive algorithm for converting a band-pass signal into a pair of signals whose real zero-crossings essentially determine its envelope and phase. Our algorithm is based on modeling s(t) using pole-zero models in the complex-time (C) plane. Drawing parallels to well known ideas in the area of speech/spectral analysis, we decompose s(t) into its minimum-phase and all-phase components. These components are then represented by their associated zero-crossings." @default.
- W1567498556 created "2016-06-24" @default.
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- W1567498556 date "2003-01-22" @default.
- W1567498556 modified "2023-09-26" @default.
- W1567498556 title "Covert zero-crossings represent envelope and phase of band-pass signals" @default.
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- W1567498556 doi "https://doi.org/10.1109/acssc.1999.831868" @default.
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